heating/air in garage/shop

I have been lookign around at used heat/air conditioners for my
garage/
shop. It is not used all the time, mainly on weekends currently. It
is
a 30x30x10 metal building with 2x4 walls in the inside and 2x4
trusses
on the ceiling.
I found a local heating air guy that has an 80's 3 ton unit that he
says was workign when pulled out of the house. The owner wanted to
upgrade. But, it is not a split system like I have in my house.
Is there a way to use this and it not look bad ? I mean, how would
you
do the duct from the outside to the inside with a 2x4 wall?
Would this be too inefficent since it is old even though I am not in
there all the time. It does get terribly hot in there in the summer,
I
am not as concerned about heat in the winter. I am in the process of
insulating currently and have no inside wall material as of yet other
than studs.
I have a 100 amp panel in my garage.
This unit is 300 bucks.

So you want to put in a 30 year old POS that wasn't good enough for
somebodys home for a couple bucks more than the scrap value??
For $300 you can go to Walmart, Sams Club or Costco and get a new window
shaker that will do the job.
If you wanted to spend a few more bucks, you can have a Fujitsu mini-split
heat pump in that will qualify for the Federal Energy Tax Credit, and use a
very small fraction of energy to run it than what that package unit will
use.

I could be wrong but what you looking for is AC heat pump
a unit for cooling and heating, I would say $300 bucks is
not bad but then everybody to his own.
Since this is like work shop it should not be problem put a
duct in all you need couple holes and yes you got to weather proof it,
but why install it out?
anybody with little knowledge should be able do it.
$1000.00 of labor and you all set.
---

This is a garage /shop I am only in on the weekends. The main reason
is sometimes in order to get anythign done I have to have the kids
with me. Putting a tv out there has really helped, as they watch
cartoons while I am working. But it is getting hotter and I dont think
they can stay in there when it starts getting 90 outside.
I dont have any windows in the building. I would add one if I thought
a window air conditioner would work but I dont see a window air
conditioner cooling 900 square feet with a 10 foot ceiling.

This is a garage /shop I am only in on the weekends. The main reason
is sometimes in order to get anythign done I have to have the kids
with me. Putting a tv out there has really helped, as they watch
cartoons while I am working. But it is getting hotter and I dont think
they can stay in there when it starts getting 90 outside.
I dont have any windows in the building. I would add one if I thought
a window air conditioner would work but I dont see a window air
conditioner cooling 900 square feet with a 10 foot ceiling.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Look dude......... Either you have the job done properly,
with a load calc and professional install for about 5-10,000
dollars, or you hack a hole into the side of the building and
slip in a window unit that will take the edge off the heat.
Either way, quit bitching.

Out doors exposes the duct to birds, squirrels, ultraviolet
light, rain, and so on. Also absorbs heat from the sunlight,
so it's less effective as cooling duct.
Some buildings do use outdoor rectangular metal duct.
Typically fiberglass wrapped.

Look you ignorant hack if you don't know wtf you're talking about
which is most of the time, just shut the fuck up. Running duct
outside is no problem. Just have it liner with duct insulation and
paint the outside with cool seal to waterproof it.

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